Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

net/proxy/proxy_resolver_error_observer_mojo.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_PROXY_PROXY_RESOLVER_ERROR_OBSERVER_MOJO_H_
+#define NET_PROXY_PROXY_RESOLVER_ERROR_OBSERVER_MOJO_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "net/interfaces/proxy_resolver_service.mojom.h"
+#include "net/proxy/proxy_resolver_error_observer.h"
+
+namespace net {
+
+// An implementation of ProxyResolverErrorObserver that forwards errors to an
+// interfaces::ProxyResolverErrorObserver mojo interface.
+class ProxyResolverErrorObserverMojo : public ProxyResolverErrorObserver {
+ public:
+  static scoped_ptr<ProxyResolverErrorObserver> Create(
+      interfaces::ProxyResolverErrorObserverPtr error_observer);
+
+  void OnPACScriptError(int line_number, const base::string16& error) override;
+
+ private:
+  class Core;
+
+  ProxyResolverErrorObserverMojo(
+      interfaces::ProxyResolverErrorObserverPtr error_observer);
+  ~ProxyResolverErrorObserverMojo() override;
+
+  scoped_refptr<Core> core_;
+};
+
+}  // namespace net
+
+#endif  // NET_PROXY_PROXY_RESOLVER_ERROR_OBSERVER_MOJO_H_